Hey everyone, this is my first time posting and I'm a little worried... I'm 18 and I haven't got my period since December 13th. Before that I got my period on November 4th which was regular, however 3 months has passed and I still didn't get my period. I know I can't be pregnant because I didn't have sex. I looked online and I've found a few symptoms like PCOS, and Fibroids; just reading those made me pretty nervous. Has this happened to anyone? Should I make an appointment to see my doctor?